package com.sky.aspect;

import com.sky.annotation.AutoFill;
import com.sky.context.BaseContext;
import com.sky.enumeration.OperationType;
import lombok.extern.slf4j.Slf4j;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.stereotype.Component;

import java.lang.reflect.Method;
import java.time.LocalDateTime;

/**
 * 自动填充updateUser ，updateTime，createUser，createTime
 */
@Aspect
@Component
@Slf4j
public class AutoFillAspect {

    @Pointcut("execution(* com.sky.mapper.*.*(..)) && @annotation(com.sky.annotation.AutoFill)")
    void pt() {
    }


    /**
     * 填充
     */
    @Before("pt()")
    public void autoFill(JoinPoint joinPoint) {
        log.info("开始自动填充");

        MethodSignature signature = (MethodSignature) joinPoint.getSignature();
        AutoFill autoFill = signature.getMethod().getAnnotation(AutoFill.class);
        OperationType value = autoFill.value();

        /**
         * 为了保险
         */
        Object[] args = joinPoint.getArgs();
        if (args == null || args.length == 0) {
            return;
        }

        Object arg = args[0];

        LocalDateTime now = LocalDateTime.now();
        Long currentId = BaseContext.getCurrentId();


        try {
            if (value == OperationType.INSERT) {
                Method setCreateTime = arg.getClass().getDeclaredMethod("setCreateTime", LocalDateTime.class);
                Method setCreateUser = arg.getClass().getDeclaredMethod("setCreateUser", Long.class);
                Method setUpdateTime = arg.getClass().getDeclaredMethod("setUpdateTime", LocalDateTime.class);
                Method setUpdateUser = arg.getClass().getDeclaredMethod("setUpdateUser", Long.class);


                setCreateTime.invoke(arg,now);
                setUpdateTime.invoke(arg,now);
                setCreateUser.invoke(arg,currentId);
                setUpdateUser.invoke(arg,currentId);
            } else if (value == OperationType.UPDATE) {
                Method setUpdateTime = arg.getClass().getDeclaredMethod("setUpdateTime", LocalDateTime.class);
                Method setUpdateUser = arg.getClass().getDeclaredMethod("setUpdateUser", Long.class);
                setUpdateTime.invoke(arg,now);
                setUpdateUser.invoke(arg,currentId);

            }
        } catch (Exception e) {
            throw new RuntimeException(e);
        }
    }

}
